Journal of the Electrochemical Society, Vol.145, No.7, 2214-2218, 1998
Reactivation of passivated iron electrodes ino magnetic field
In the presence of a magnetic field, the reactivation of a passivated iron electrode in 0.5 mol dm(-3) H2SO4 solution was studied experimentally with cyclic voltammetry, electrochemical impedance spectroscopy, : and holographic microphotography. In the presence of the magnetic field, symmetric solution flow of the electrolyte phase was observed when the reactivation current increased abruptly. This phenomenon is caused by the Lorentz force on ions moving in both electric and magnetic fields. The thick film formed on the iron electrode surface during the reactivation is also discussed, and is believed to be Fe(OH)(2) for the short formation time and the big difference in the conductivity of the ions involved.